USED MAZAK QTN 200-II – 2002

The 2002 Mazak QTN 200-II is a robust 2-axis CNC turning center designed for medium-sized precision turning applications that demand high productivity, exceptional accuracy, and dependable long-term performance. Part of Yamazaki Mazak’s Quick Turn Nexus (QTN) Series, the QTN 200-II combines a rigid slant-bed construction, high-speed spindle, rapid servo turret, and the proven Mazatrol CNC control to provide outstanding machining performance for both job shops and high-volume production facilities. Its larger capacity compared to the QTN 100-II makes it an excellent choice for manufacturers producing shafts, flanges, valve bodies, hydraulic components, and other medium-sized precision parts. The machine has earned an excellent reputation for reliability, ease of operation, and low maintenance costs, making it one of the most sought-after used CNC lathes in its class.

Built on a heavy-duty cast iron slant-bed platform, the Mazak QTN 200-II delivers exceptional rigidity, thermal stability, and vibration damping during continuous machining operations. The machine features approximately 7.5 inches (190 mm) of X-axis travel and 21.1 inches (535 mm) of Z-axis travel, supporting a maximum turning diameter of approximately 13.8 inches (350 mm) and a maximum turning length of approximately 20.2 inches (514 mm). Equipped with an 8-inch hydraulic chuck and a 5,000 RPM spindle, the QTN 200-II provides the power and speed required to machine aluminum, carbon steel, stainless steel, alloy steels, brass, cast iron, and engineering plastics with excellent surface finishes and repeatability. Its 3-inch spindle bore also enables efficient bar work and larger diameter machining.

The 2002 model is commonly equipped with the Mazatrol Fusion 640T CNC Control, allowing operators to program using either Mazatrol conversational programming or standard ISO G-code. The machine includes a 12-station servo indexing turret capable of rapid indexing for reduced cycle times and improved production efficiency. Standard equipment often includes automatic lubrication, hydraulic chuck, programmable tailstock, flood coolant system, and optional chip conveyor and parts catcher. The intuitive Mazatrol interface shortens programming time while maintaining the flexibility required for both prototype and production machining.

The Mazak QTN 200-II is widely used in the automotive, aerospace, medical, oil and gas, hydraulic, agricultural equipment, and general manufacturing industries. Typical applications include precision shafts, bushings, valve bodies, hydraulic cylinders, threaded components, pump parts, flanges, couplings, and production turned components. Its combination of rigidity, spindle performance, and proven reliability makes it an excellent machine for a wide range of precision turning operations.

Purchasing a used 2002 Mazak QTN 200-II provides manufacturers with premium Japanese-built CNC turning technology at a significantly lower investment than purchasing new equipment. Mazak machines are known worldwide for their exceptional build quality, dependable performance, readily available replacement parts, and excellent resale value. A properly maintained QTN 200-II continues to provide years of accurate and productive machining, making it an outstanding investment for precision manufacturing operations.

MAZAK QTN 200-II – 2002 SPECIFICATIONS

Axis

Travels / Work Envelope

Spindle

Turret

CNC Control

Coolant / Chip Management

Power Requirements

Dimensions

General Information

HOW MUCH DOES A USED MAZAK QTN 200-II – 2002 COST?

A used 2002 Mazak QTN 200-II typically sells for $22,000 to $50,000 USD, depending on spindle hours, machine condition, maintenance history, tooling package, CNC control configuration, and installed options such as a tailstock, chip conveyor, parts catcher, bar feeder, or automatic tool presetter. Machines with documented maintenance records, lower operating hours, and production-ready accessories generally command higher resale values because they require minimal setup before entering production.

Before purchasing a used Mazak QTN 200-II, buyers should inspect the spindle bearings, turret indexing accuracy, hydraulic system, guideways, ballscrews, lubrication system, and overall machine geometry. A properly maintained QTN 200-II provides excellent long-term value by combining reliable Mazatrol controls, rigid construction, and proven Japanese engineering, making it an outstanding investment for precision turning applications across a wide range of manufacturing industries.

MAZAK QTN 200-II VS MAZAK QTN 250-II – WHICH ONE TO BUY?

The Mazak QTN 200-II and Mazak QTN 250-II are high-performance CNC turning centers designed for precision machining, high productivity, and long-term reliability. Both machines belong to the Mazak QUICK TURN NEXUS (QTN) Series and are widely used in the aerospace, automotive, medical, energy, oil and gas, and general manufacturing industries. While both models share Mazak’s reputation for rigid construction, advanced CNC controls, and dependable spindle performance, the primary difference lies in machining capacity. The QTN 250-II is designed to accommodate larger diameter workpieces and offers greater turning capacity, while the QTN 200-II is optimized for small- to medium-sized precision components.

The Mazak QTN 200-II is ideal for manufacturers producing shafts, bushings, hydraulic fittings, valve components, medical devices, and other precision turned parts. Its compact design, rapid positioning speeds, and excellent accuracy make it well suited for both job shops and production facilities.

The Mazak QTN 250-II expands machining capability by offering a larger chuck size, increased swing capacity, and the ability to machine heavier and longer components. It is commonly selected by manufacturers producing larger industrial parts that require greater workpiece capacity without sacrificing precision.

Both machines deliver excellent machining performance and reliability. The QTN 200-II is the better choice for high-volume production of smaller precision components, while the QTN 250-II is recommended for shops that frequently machine larger workpieces or anticipate future production growth.

For most manufacturers focused on standard precision turning applications, the Mazak QTN 200-II provides an excellent balance of productivity, operating cost, and machining performance.

MAZAK QTN 200-II SPINDLE NOT TURNING – CAUSES AND TROUBLESHOOTING

If the spindle on a Mazak QTN 200-II does not rotate, the issue may be caused by spindle drive faults, electrical failures, CNC control alarms, hydraulic problems, lubrication issues, or machine safety interlocks. Prompt troubleshooting helps minimize downtime and prevents unnecessary damage to spindle components.

Begin by checking the CNC control for active alarms. Emergency stop activation, door interlock faults, spindle drive alarms, servo errors, lubrication warnings, hydraulic pressure alarms, chuck clamping faults, or thermal overload conditions can prevent spindle operation. Clear any active alarms before attempting to restart the spindle.

Inspect the spindle drive system for electrical issues. Loose electrical connections, damaged encoder cables, faulty spindle amplifiers, blown fuses, motor overload conditions, or overheating can prevent spindle rotation. Verify that spindle lubrication systems, hydraulic pressure, coolant circulation, compressed air supply, and machine power are operating correctly.

Review the CNC program and setup conditions. Missing M03 or M04 spindle commands, incorrect spindle speed settings, spindle orientation commands, chuck clamping problems, or interrupted machining cycles may prevent spindle startup. Confirm that the workholding setup is secure and all machine preparation sequences have been completed.

If the spindle begins rotating but stops unexpectedly, inspect spindle bearings, chuck condition, hydraulic clamping force, spindle nose cleanliness, tooling setup, and cutting parameters. Excessive vibration, abnormal noise, or overheating may indicate spindle bearing wear or mechanical damage.

Routine spindle inspections, lubrication maintenance, hydraulic servicing, and preventive maintenance significantly reduce unexpected spindle failures and extend machine life.

MAZAK QTN 200-II MAINTENANCE AND PREVENTIVE CARE GUIDE

The Mazak QTN 200-II is designed for continuous precision turning in demanding production environments. A structured preventive maintenance program is essential for maintaining machining accuracy, spindle reliability, and long-term production efficiency.

Daily maintenance should include removing chips from the machining enclosure, spindle nose, chuck, turret, guideways, and chip collection areas. Operators should inspect coolant levels, coolant concentration, lubrication systems, hydraulic pressure, compressed air supply, spindle condition, and cutting tools before production begins. Keeping the spindle and chuck clean improves workholding accuracy and machining consistency.

Weekly maintenance should include inspecting coolant pumps, chip conveyors, lubrication units, hydraulic systems, spindle cooling systems, turret indexing mechanisms, chuck clamping operation, and electrical cabinet filters. Chip buildup around the turret and guideways should be removed to prevent premature wear and axis movement problems.

Monthly inspections should focus on spindle runout, chuck accuracy, turret alignment, ball screws, linear guideways, spindle bearings, encoder cables, hydraulic lines, electrical connections, lubrication systems, coolant filtration systems, and machine leveling. Machine geometry should also be verified periodically to maintain precision.

Additional preventive maintenance includes monitoring spindle vibration, checking axis backlash, replacing worn filters, servicing lubrication systems, inspecting hydraulic components, and maintaining detailed maintenance records. Identifying wear early helps prevent major repairs and costly production interruptions.

Proper preventive maintenance extends spindle life, improves machining accuracy, reduces downtime, and allows the Mazak QTN 200-II to consistently deliver high-quality turning performance.

FAQ

What is the Mazak QTN 200-II?

The Mazak QTN 200-II is a CNC turning center designed for precision turning, high productivity, and reliable manufacturing of small- and medium-sized components. It is part of the Mazak QUICK TURN NEXUS Series and combines rigid machine construction, advanced CNC controls, precision spindle technology, and a high-performance turret to deliver accurate and repeatable machining.

The machine is widely used in aerospace, automotive, medical, hydraulic, electronics, oil and gas, and general engineering industries. It is capable of machining shafts, bushings, valve bodies, hydraulic fittings, threaded components, precision housings, and many other complex turned parts.

Its combination of machining accuracy, dependable spindle performance, efficient chip management, and flexible production capability makes the QTN 200-II a popular choice for both job shops and high-volume manufacturing operations.

What are the most common problems with the Mazak QTN 200-II?

The most common problems with the Mazak QTN 200-II include spindle alarms, turret indexing faults, hydraulic system issues, lubrication warnings, servo drive errors, encoder failures, coolant contamination, chuck clamping problems, spindle orientation faults, electrical communication errors, and axis positioning issues.

Machines operating continuously may also experience spindle bearing wear, hydraulic pressure fluctuations, turret alignment problems, thermal expansion, and normal mechanical wear over time. Improper lubrication, coolant contamination, worn tooling, excessive cutting loads, and delayed preventive maintenance can increase the likelihood of these issues.

Routine spindle inspections, lubrication system servicing, hydraulic maintenance, coolant management, turret alignment verification, machine calibration, and scheduled preventive maintenance help minimize downtime and ensure the Mazak QTN 200-II continues to provide accurate, reliable, and productive machining performance.